HELLO ALL:

Of course I know this isn't legal and I'm just curious, haha.

But what happens when you put a gutted cat on, ..... I have a 1983Z28 w/305 HO, CC qjet. Any mods needed or what???

thanks,
PAT
>>>>>>

 

Probably gain like 5-10 horses, just another method of lowering back pressure which u want none of (some will say u need some theyre dumb and wrong) only downside is u wont pass emissions, will get more power and sounds way better.

 

Don't gut the cat unless you want it so sound like crap, plus it doesn't help much, if any on power, it just sounds bad, put a straight pipe in it's place and it will sound much better.

 

My **** sounds great man ur trippen :lala:

 

Well maybe you think it sounds good, like they say beauty is in the eye of the beholder, after all some guys like the sound of straight pipes. I made the mistake of gutting my cat when I already had a Dyno-max cat back, it was louder for sure but it had this crappy tinny sound that I didn't like, so I had a straight pipe welded in and that completely changed the sound, made it deeper and more mellow. Plus if you think about it a gutted cat is not good for flow cause when the hot exhaust gas hits the open chamber it expands, and when a gas expands it cools, right, ok so now the gas has expanded and now it has to be forced back into a smaller pipe to get back out of the gutted cat, that has got to cause excess backpressure if you ask me.

 

I like the sound of straight pipes lol :hail: unfortunately my neighbors and cops do not

 

gutting the cat doesnt sound to good, it usually gives it a tinny sound

either place a straight pipe through the cat or replase it with a straight pipe, it will sound a lot better


one thing about putting a pipe through the cat if you ever have a cop look to see if your running a full exhaust it will look normal, but if they do an emission test your screwed

 

Has anyone successfully been able to put a straight pipe through a gutted cat to avoid the turbulance? I will need to pass a visual inspection so the cats have to stay on.